Examples of immunohistochemistry on formalin-fixed, paraffin-embedded human tissues or cell pellets. Panels (A–H) are shown at 200 × magnification; (I–K), 100 ×. (A) UC BMI1 score 3; (B) same UC, p16 negative; (C) UC, BMI1, score 0; (D) same UC, p16 strong; (E) UC, BMI1, score 3; (F) same UC, p16 strong; (G) UC, BMI1 score 3; (H) same UC, p16 strong; (I) CIS, BMI1, score 3; (J) CIS, BMI1, score 2; (K) CIS, BMI1, score 2. Arrow highlights border of normal urothelium and CIS.